micromizing dmenu step 1

[dmenu.git] / dmenu.c

diff --git a/main.c b/dmenu.c
similarity index 79%
rename from main.c
rename to dmenu.c
index fcabf01..b684175 100644 (file)
--- a/main.c
+++ b/dmenu.c
@@ -1,16 +1,37 @@
 /* See LICENSE file for copyright and license details. */
-#include "dmenu.h"
 #include <ctype.h>
 #include <locale.h>
+#include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
+#include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include <X11/keysym.h>
 
+/* macros */
 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
 
+/* enums */
+enum { ColFG, ColBG, ColLast };
+
+/* typedefs */
+typedef struct {
+       int x, y, w, h;
+       unsigned long norm[ColLast];
+       unsigned long sel[ColLast];
+       Drawable drawable;
+       GC gc;
+       struct {
+               XFontStruct *xfont;
+               XFontSet set;
+               int ascent;
+               int descent;
+               int height;
+       } font;
+} DC; /* draw context */
+
 typedef struct Item Item;
 struct Item {
        Item *next;             /* traverses all items */
@@ -18,8 +39,29 @@ struct Item {
        char *text;
 };
 
-/* static */
+/* forward declarations */
+static void *emalloc(unsigned int size);
+static void eprint(const char *errstr, ...);
+static char *estrdup(const char *str);
+static void drawtext(const char *text, unsigned long col[ColLast]);
+static unsigned int textw(const char *text);
+static unsigned int textnw(const char *text, unsigned int len);
+static void calcoffsets(void);
+static void drawmenu(void);
+static Bool grabkeyboard(void);
+static unsigned long getcolor(const char *colstr);
+static void initfont(const char *fontstr);
+static int strido(const char *text, const char *pattern);
+static void match(char *pattern);
+static void kpress(XKeyEvent * e);
+static char *readstdin(void);
+static void usage(void);
+
 
+/* variables */
+static int screen;
+static Display *dpy;
+static DC dc = {0};
 static char text[4096];
 static char *prompt = NULL;
 static int mw, mh;
@@ -38,6 +80,93 @@ static Item *curr = NULL;
 static Window root;
 static Window win;
 
+#include "config.h"
+
+static void *
+emalloc(unsigned int size) {
+       void *res = malloc(size);
+
+       if(!res)
+               eprint("fatal: could not malloc() %u bytes\n", size);
+       return res;
+}
+
+static void
+eprint(const char *errstr, ...) {
+       va_list ap;
+
+       va_start(ap, errstr);
+       vfprintf(stderr, errstr, ap);
+       va_end(ap);
+       exit(EXIT_FAILURE);
+}
+
+static char *
+estrdup(const char *str) {
+       void *res = strdup(str);
+
+       if(!res)
+               eprint("fatal: could not malloc() %u bytes\n", strlen(str));
+       return res;
+}
+
+
+static void
+drawtext(const char *text, unsigned long col[ColLast]) {
+       int x, y, w, h;
+       static char buf[256];
+       unsigned int len, olen;
+       XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
+       XSetForeground(dpy, dc.gc, col[ColBG]);
+       XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+       if(!text)
+               return;
+       w = 0;
+       olen = len = strlen(text);
+       if(len >= sizeof buf)
+               len = sizeof buf - 1;
+       memcpy(buf, text, len);
+       buf[len] = 0;
+       h = dc.font.ascent + dc.font.descent;
+       y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
+       x = dc.x + (h / 2);
+       /* shorten text if necessary */
+       while(len && (w = textnw(buf, len)) > dc.w - h)
+               buf[--len] = 0;
+       if(len < olen) {
+               if(len > 1)
+                       buf[len - 1] = '.';
+               if(len > 2)
+                       buf[len - 2] = '.';
+               if(len > 3)
+                       buf[len - 3] = '.';
+       }
+       if(w > dc.w)
+               return; /* too long */
+       XSetForeground(dpy, dc.gc, col[ColFG]);
+       if(dc.font.set)
+               XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
+       else
+               XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
+}
+
+static unsigned int
+textw(const char *text) {
+       return textnw(text, strlen(text)) + dc.font.height;
+}
+
+static unsigned int
+textnw(const char *text, unsigned int len) {
+       XRectangle r;
+
+       if(dc.font.set) {
+               XmbTextExtents(dc.font.set, text, len, NULL, &r);
+               return r.width;
+       }
+       return XTextWidth(dc.font.xfont, text, len);
+}
+
 static void
 calcoffsets(void) {
        unsigned int tw, w;
@@ -119,7 +248,7 @@ grabkeyboard(void) {
 }
 
 static unsigned long
-initcolor(const char *colstr) {
+getcolor(const char *colstr) {
        Colormap cmap = DefaultColormap(dpy, screen);
        XColor color;
 
@@ -435,12 +564,6 @@ usage(void) {
                "             [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
 }
 
-/* extern */
-
-int screen;
-Display *dpy;
-DC dc = {0};
-
 int
 main(int argc, char *argv[]) {
        Bool bottom = False;
@@ -508,10 +631,10 @@ main(int argc, char *argv[]) {
        }
        XFreeModifiermap(modmap);
        /* style */
-       dc.norm[ColBG] = initcolor(normbg);
-       dc.norm[ColFG] = initcolor(normfg);
-       dc.sel[ColBG] = initcolor(selbg);
-       dc.sel[ColFG] = initcolor(selfg);
+       dc.norm[ColBG] = getcolor(normbg);
+       dc.norm[ColFG] = getcolor(normfg);
+       dc.sel[ColBG] = getcolor(selbg);
+       dc.sel[ColFG] = getcolor(selfg);
        initfont(font);
        /* menu window */
        wa.override_redirect = 1;